Fish Surveys
Metadata
| Number of fish surveys per location, habitat, and exposure | ||||||
|---|---|---|---|---|---|---|
| Exposure | Strata | # Sites | # Transects | # Reels | Surveyed distance (m) | |
| Fanna | ||||||
| Forereef | Leeward | 2 | 1 | 2 | 6 | 150 |
| Forereef | Windward | 2 | 5 | 10 | 30 | 750 |
| Total | — | — | 6 | 12 | 36 | 900 |
| Helen | ||||||
| Backreef | Lagoon | 1 | 1 | 2 | 6 | 150 |
| Patchreef | Lagoon | 2 | 3 | 6 | 18 | 450 |
| Forereef | Leeward | 2 | 6 | 12 | 36 | 900 |
| Forereef | Windward | 2 | 5 | 10 | 30 | 750 |
| Total | — | — | 15 | 30 | 90 | 2250 |
| Merir | ||||||
| Forereef | Leeward | 2 | 3 | 6 | 18 | 450 |
| Forereef | Windward | 2 | 4 | 8 | 24 | 600 |
| Total | — | — | 7 | 14 | 42 | 1050 |
| Pulo Anna | ||||||
| Forereef | Leeward | 2 | 2 | 4 | 12 | 300 |
| Forereef | Windward | 2 | 2 | 4 | 12 | 300 |
| Total | — | — | 4 | 8 | 24 | 600 |
| Sonsorol | ||||||
| Forereef | Leeward | 2 | 4 | 8 | 24 | 600 |
| Forereef | Windward | 2 | 3 | 6 | 18 | 450 |
| Total | — | — | 7 | 14 | 42 | 1050 |
| Tobi | ||||||
| Forereef | Leeward | 2 | 5 | 10 | 30 | 750 |
| Forereef | Windward | 2 | 1 | 2 | 6 | 150 |
| Total | — | — | 6 | 12 | 36 | 900 |
| Grand total | — | — | 45 | 90 | 270 | 6750 |
QA/QC
Taxa
Observations
Expedition Summary
| Average species richness, abundance, and biomass | ||||||
|---|---|---|---|---|---|---|
| Sites | # Transects | # Reels | # Taxa | Abundance (ind/m2) | Biomass (g/m2) | |
| By exposure | ||||||
| Lagoon | 4 | 8 | 24 | 67.88 | 8.04 (7.53) | 191.03 (73.56) |
| Leeward | 21 | 42 | 126 | 67.29 | 9.64 (6.72) | 636.46 (264.39) |
| Windward | 20 | 40 | 120 | 72.88 | 12.94 (8.39) | 857.42 (570.15) |
| By strata | ||||||
| Deep | 44 | 45 | 135 | 69.44 | 10.42 (7.46) | 799.14 (540.27) |
| Shallow | 44 | 45 | 135 | 70.20 | 11.51 (8.00) | 591.00 (336.92) |
| Overall | ||||||
| Total | 45 | 90 | 270 | 69.82 | 10.96 (7.71) | 695.07 (459.76) |
Location summary
| Average species richness, abundance, and biomass by location | ||||||
|---|---|---|---|---|---|---|
| Sites | # Transects | # Reels | # Taxa | Abundance (ind/m2) | Biomass (g/m2) | |
| Fanna | ||||||
| Deep | 6 | 6 | 18 | 77.50 | 13.76 | 751.83 |
| Shallow | 6 | 6 | 18 | 60.83 | 14.36 | 328.81 |
| Overall | — | 12 | 36 | 69 | 14 | 540 |
| Helen | ||||||
| Deep | 14 | 15 | 45 | 67.80 | 6.82 | 696.49 |
| Shallow | 14 | 15 | 45 | 74.87 | 9.73 | 646.62 |
| Overall | — | 30 | 90 | 71 | 8 | 672 |
| Merir | ||||||
| Deep | 7 | 7 | 21 | 67.57 | 6.33 | 875.68 |
| Shallow | 7 | 7 | 21 | 73.43 | 5.68 | 697.21 |
| Overall | — | 14 | 42 | 70 | 6 | 786 |
| Pulo Anna | ||||||
| Deep | 4 | 4 | 12 | 61.25 | 17.72 | 1431.37 |
| Shallow | 4 | 4 | 12 | 67.50 | 10.43 | 756.46 |
| Overall | — | 8 | 24 | 64 | 14 | 1094 |
| Sonsorol | ||||||
| Deep | 7 | 7 | 21 | 72.57 | 17.38 | 552.88 |
| Shallow | 7 | 7 | 21 | 64.00 | 17.22 | 422.41 |
| Overall | — | 14 | 42 | 68 | 17 | 488 |
| Tobi | ||||||
| Deep | 6 | 6 | 18 | 69.50 | 7.87 | 879.63 |
| Shallow | 6 | 6 | 18 | 73.17 | 13.96 | 676.63 |
| Overall | — | 12 | 36 | 71 | 11 | 778 |
Analyses
Diversity
| Results of Adonis model for univariate analysis of fish species richness | |||||
|---|---|---|---|---|---|
| df | SumOfSqs | R2 | statistic | p.value | |
| depth_strata | 1 | 17.187 | 0.001 | 0.134 | 0.688 |
| location | 5 | 700.063 | 0.061 | 1.095 | 0.348 |
| exposure | 1 | 865.000 | 0.075 | 6.763 | 0.014 |
| habitat | 1 | 17.074 | 0.001 | 0.133 | 0.712 |
| diver | 1 | 18.771 | 0.002 | 0.147 | 0.737 |
| Residual | 79 | 10104.930 | 0.877 | NA | NA |
| Total | 89 | 11527.156 | 1.000 | NA | NA |
Abundance
| Results of Adonis model for univariate analysis of fish abundance | |||||
|---|---|---|---|---|---|
| df | SumOfSqs | R2 | statistic | p.value | |
| depth_strata | 1 | 29.318 | 0.006 | 0.767 | 0.381 |
| location | 5 | 1245.230 | 0.235 | 6.515 | 0.001 |
| exposure | 1 | 229.449 | 0.043 | 6.003 | 0.021 |
| habitat | 1 | 2.019 | 0.000 | 0.053 | 0.805 |
| diver | 1 | 695.530 | 0.132 | 18.196 | 0.001 |
| Residual | 79 | 3019.706 | 0.571 | NA | NA |
| Total | 89 | 5289.048 | 1.000 | NA | NA |
Biomass
| Results of Adonis model for univariate analysis of fish biomass | |||||
|---|---|---|---|---|---|
| df | SumOfSqs | R2 | statistic | p.value | |
| diver | 1 | 281913.07 | 0.015 | 2.014 | 0.170 |
| depth_strata | 1 | 965942.72 | 0.051 | 6.899 | 0.010 |
| habitat | 1 | 16539.82 | 0.001 | 0.118 | 0.709 |
| exposure | 1 | 1580881.99 | 0.084 | 11.291 | 0.004 |
| location | 5 | 3247391.55 | 0.173 | 4.639 | 0.003 |
| Residual | 79 | 11060545.73 | 0.588 | NA | NA |
| Total | 89 | 18812734.31 | 1.000 | NA | NA |
By depth
By exposure
| Average species richness, abundance, and biomass by location and exposure | ||||||
|---|---|---|---|---|---|---|
| Sites | # Transects | # Reels | # Taxa | Abundance (ind/m2) | Biomass (g/m2) | |
| Fanna | ||||||
| Leeward | 1 | 2 | 6 | 69.50 | 10.40 | 812.14 |
| Windward | 5 | 10 | 30 | 69.10 | 14.79 | 485.95 |
| Helen | ||||||
| Lagoon | 4 | 8 | 24 | 67.88 | 8.04 | 191.03 |
| Leeward | 6 | 12 | 36 | 66.42 | 6.01 | 544.84 |
| Windward | 5 | 10 | 30 | 80.00 | 11.18 | 1208.03 |
| Merir | ||||||
| Leeward | 3 | 6 | 18 | 68.17 | 5.40 | 867.84 |
| Windward | 4 | 8 | 24 | 72.25 | 6.46 | 725.40 |
| Pulo Anna | ||||||
| Leeward | 2 | 4 | 12 | 62.00 | 13.51 | 667.86 |
| Windward | 2 | 4 | 12 | 66.75 | 14.64 | 1519.97 |
| Sonsorol | ||||||
| Leeward | 4 | 8 | 24 | 65.50 | 13.97 | 399.07 |
| Windward | 3 | 6 | 18 | 72.00 | 21.74 | 605.73 |
| Tobi | ||||||
| Leeward | 5 | 10 | 30 | 70.90 | 11.36 | 749.79 |
| Windward | 1 | 2 | 6 | 73.50 | 8.67 | 919.82 |
By family
By trophic group
By species
| Top 30 fish species with highest contribution to overall fish biomass | |||||||
|---|---|---|---|---|---|---|---|
| Trophic/Family | Taxon | Min length (cm) | Mean length (cm) | Max length (cm) | Frequency (% stations) | Abundance (ind/m2) | Biomass (g/m2) |
| Planktivore | |||||||
| Fusilier | Pterocaesio tile | 15.5 | 21.0775 | 28.5 | 65.5556 | 0.5035 | 100.6940 |
| Surgeonfish | Naso hexacanthus | 35.0 | 49.1292 | 60.0 | 60.0000 | 0.0324 | 78.2022 |
| Fusilier | Caesio teres | 12.0 | 22.8765 | 32.5 | 48.8889 | 0.1561 | 34.2468 |
| Snapper | Macolor macularis | 10.0 | 42.7249 | 60.0 | 80.0000 | 0.0191 | 28.5944 |
| Fusilier | Pterocaesio randalli | 16.0 | 19.2286 | 25.0 | 24.4444 | 0.2209 | 24.4358 |
| Fusilier | Caesio lunaris | 20.0 | 23.8846 | 32.5 | 30.0000 | 0.0636 | 24.2721 |
| Surgeonfish | Naso vlamingii | 20.0 | 37.5598 | 55.0 | 73.3333 | 0.0146 | 18.4607 |
| Fusilier | Pterocaesio pisang | 9.5 | 14.1216 | 17.5 | 21.1111 | 0.3037 | 14.7459 |
| Surgeonfish | Naso annulatus | 50.0 | 62.2581 | 76.5 | 22.2222 | 0.0025 | 12.2742 |
| Surgeonfish | Acanthurus thompsoni | 7.5 | 16.6341 | 23.0 | 73.3333 | 0.1142 | 12.0412 |
| Damselfish | Lepidozygus tapeinosoma | 4.0 | 7.2604 | 10.5 | 25.5556 | 1.2689 | 11.1905 |
| Fusilier | Pterocaesio tessellata | 14.0 | 19.2045 | 25.0 | 15.5556 | 0.0720 | 10.9723 |
| Damselfish | Chromis ternatensis | 2.0 | 6.5685 | 10.5 | 74.4444 | 0.8750 | 10.5212 |
| Soldierfish | Myripristis kuntee | 13.0 | 16.5206 | 21.0 | 63.3333 | 0.0580 | 8.1460 |
| Soldierfish | Myripristis berndti | 7.0 | 22.2576 | 29.0 | 56.6667 | 0.0369 | 7.3766 |
| Triggerfish | Odonus niger | 16.0 | 23.2586 | 28.0 | 15.5556 | 0.0203 | 6.8287 |
| Soldierfish | Myripristis vittata | 8.0 | 16.1556 | 18.0 | 46.6667 | 0.0737 | 6.8130 |
| Damselfish | Pycnochromis margaritifer | 2.5 | 4.9610 | 5.5 | 87.7778 | 3.0841 | 6.0863 |
| Fusilier | Caesio caerulaurea | 13.5 | 21.5833 | 28.0 | 7.7778 | 0.0295 | 5.3067 |
| Snapper | Macolor niger | 28.0 | 44.1800 | 60.0 | 12.2222 | 0.0029 | 4.6755 |
| Top-predator | |||||||
| Jack | Caranx sexfasciatus | 52.5 | 56.2500 | 62.5 | 4.4444 | 0.0049 | 13.9544 |
| Jack | Caranx papuensis | 35.0 | 43.3333 | 55.0 | 2.2222 | 0.0167 | 13.4909 |
| Jack | Elagatis bipinnulata | 30.0 | 56.3421 | 67.5 | 13.3333 | 0.0136 | 12.6955 |
| Snapper | Lutjanus bohar | 8.0 | 40.4231 | 80.0 | 68.8889 | 0.0093 | 10.6575 |
| Jack | Caranx melampygus | 22.0 | 44.1250 | 85.0 | 44.4444 | 0.0044 | 5.9582 |
| Snapper | Lutjanus gibbus | 25.0 | 33.3396 | 41.0 | 32.2222 | 0.0110 | 4.9626 |
| Herbivore | |||||||
| Parrotfish | Scarus rubroviolaceus | 6.0 | 39.7792 | 65.0 | 54.4444 | 0.0053 | 7.6076 |
| Parrotfish | Chlorurus microrhinos | 5.0 | 44.6389 | 65.0 | 35.5556 | 0.0036 | 5.7659 |
| Chub | Kyphosus cinerascens | 13.0 | 32.3784 | 45.0 | 23.3333 | 0.0102 | 5.7253 |
| Surgeonfish | Naso unicornis | 38.0 | 46.6667 | 58.0 | 15.5556 | 0.0026 | 5.2751 |